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    Analysis of Ucs by Opensees

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    gundulp
    This document summarizes the analysis of the UCS building using OpenSees. The objectives are to conduct a 2D nonlinear time history analysis, develop floor responses, and assess uncertainties. The 2D model is complete and time history results are available. Future tasks include model verification using another building, assessing uncertainties like mass and damping, and extending the model to 3D.

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    Analysis of Ucs by Opensees

    Uploaded by

    gundulp
    4 views10 pages
    This document summarizes the analysis of the UCS building using OpenSees. The objectives are to conduct a 2D nonlinear time history analysis, develop floor responses, and assess uncertainties. The 2D model is complete and time history results are available. Future tasks include model verification using another building, assessing uncertainties like mass and damping, and extending the model to 3D.

    Original Description:

    Mosalam

    Original Title

    Mosalam 23 May 2002

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    This document summarizes the analysis of the UCS building using OpenSees. The objectives are to conduct a 2D nonlinear time history analysis, develop floor responses, and assess uncertainties. The 2D model is complete and time history results are available. Future tasks include model verification using another building, assessing uncertainties like mass and damping, and extending the model to 3D.

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    4 views10 pages

    Analysis of Ucs by Opensees

    Uploaded by

    gundulp
    This document summarizes the analysis of the UCS building using OpenSees. The objectives are to conduct a 2D nonlinear time history analysis, develop floor responses, and assess uncertainties. The 2D model is complete and time history results are available. Future tasks include model verification using another building, assessing uncertainties like mass and damping, and extending the model to 3D.

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    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
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    You are on page 1of 10

    Analysis of UCS

    by OpenSees
    GSR Tae-Hyung Lee
    PI
    Khalid M. Mosalam
    May 23rd, 2002 Meeting at RFS

    Objectives
    Conduct and verify a 2-D nonlinear time history
    analysis of UCS using OpenSees
    Develop floor responses to be utilized for the
    UCB and UCI shake table tests of the building
    contents
    Assess the importance of the different sources
    of uncertanties on the structural response
    Extend investigation to 3-D modeling including
    multi-directional ground motion

    Current Status
    2-D structural model completed for the UCS
    building
    Time history results (as absolute and relative
    floor displacements and accelerations and midpoints of all floors) are available for two levels
    of seismic hazard (50% and 10% in 50 years)
    Similar results will be available for the third
    level of seismic hazard (2% in 50 years) by the
    end of July.

    Future Tasks
    1) Verification:
    A similar shear wall building
    where response data are
    available will be analyzed
    using the same modeling
    approach in OpenSees
    An example is the 9 story
    Robert A. Millikan Library
    Building at Caltech
    [McVerry 1979]

    Future Tasks (Cont.)


    2) Assess Importance of Uncertainties:
    The following five sources will be considered
    a) Spectral acceleration
    b) Mass
    c) Damping
    d) Force-deformation characteristics of the different
    elements, e.g. in terms of moment-curvature
    relations
    e) Soil/foundation properties

    Future Tasks (Cont.)


    2) Assess Importance of Uncertainties (Cont.):
    The objective is to conduct similar study to that of
    (Porter et al. 2002, Earthquake Spectra) with
    focus on structural response parameters (rather
    than costs) and their sensitivity to modeling
    issues and input intensities.
    The importance of uncertainties will be assessed by
    developing a tornado diagram using the idea of
    swing estimation.

    Future Tasks (Cont.)


    A methodology has
    been developed
    using SFEM to
    generate
    probabilistic
    moment-curvature
    or interaction
    diagrams of RC
    elements [Lee and
    Mosalam, 2002,
    Computers and
    Structures]

    Future Tasks (Cont.)


    Several verification
    studies were
    conducted

    Future Tasks (Cont.)


    Some results of
    interaction
    diagrams

    Future Tasks (Cont.)


    3) Extension to 3-D:
    Modeling structural elements in longitudinal as well
    as transverse direction.
    Subject the building to simultaneous components of
    the ground motions.
    Investigate variations of floor response parameters
    within the floor space.

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